CVEvulnerability

CVE-2026-40013

4.3 MEDIUM Published 2026-08-28 Modified 2026-09-03 Official page ↗
Status
Deferred
Published
2026-08-28
Last modified
2026-09-03
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-124

Description

An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes an out-of-bounds write when the ManageSieve service compiles the script. This causes memory corruption and an observed crash of the ManageSieve process, resulting in denial of service for script management. This might be able to be used for remote code execution. Disable the ManageSieve service if users do not need remote Sieve script management. Update to non-vulnerable version. No publicly available exploits are known.

Related

Weakness · CWE (1)

  • CWE-124 Buffer Underwrite weakness

References